code: def tearDownClass(cls) -> None:
      ray.shutdown()
  
file_path: ray/rllib/algorithms/sac/tests/test_rnnsac.py
imports: import unittest
  import ray
  from ray.rllib.algorithms import sac
  from ray.rllib.utils.framework import try_import_tf, try_import_torch
  from ray.rllib.utils.test_utils import check_compute_single_action, framework_iterator
label_desc: Use image node_id 2 for calling the TestRNNSAC obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types